BAL Insulating Firebrick（High Alumina）

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BAL

BAL Insulating Firebrick（High Alumina）

BAL Series are special-purpose alumina insulating firebricks developed using ISOLITE’s own proprietary technology.

Manufactured from alumina hollow particles, 99% Al₂O₃ content, and has the following properties:

① High corrosion resistance ② High spalling resistance

Typical Applications

Bright Annealing, Powder Metallurgy Sintering, Brazing, Semiconductor Sintering and Hydrogen Atmosphere Heat Treating Furnaces

Specifications

BAL-99 : Standard

BAL-99M : Increased mechanical strength

BAL-LS : Minimal impurity content to minimize the presence of impurities in the furnace during use in high temperatures and highly reduced atmospheres.

Product Name		BAL-99	BAL-99M	BAL-LS
Max. Service Temperature (°C)		1800	1800	1800
Bulk Density		1.64	1.63	1.62
Cold Crushing Strength (MPa) JIS R 2615		15.9	20.4	12

Modulus of Rupture (MPa) JIS R 2619		5.5	9.6	4.4

Thermal Conductivity at 800°C (W/(m・K)) JIS R 2616		1.65	1.65	1.65
Reheat Shrinkage (%) at 1700°C×8h JIS R 2613:1985		0.3	0.2	0.03
Chemical Composition (%) JIS R 2216	Al₂O₃	99.2	99.3	99.3
	SiO₂	0.4	0.4	0.4
	Fe₂O₃	0.4	0.1	0.1

Data shown are typical values obtained in accordance with accepted test methods.
They are provided for your reference only and are subject to change without notice.